I am in the middle of hooking up a 600 gallon, (2 x 300 gallon) water storage tanks in my cellar/basement. My house is a 2 storey, 80 yr old farmhouse with a drilled well. The well pump is a 3/4 hp and pressures up to a 33 gallon pressure tank. I am planning on setting up a similiar system that will draw water from the Cistern tanks and pump throughout the house. The 3/4 hp well pump will then be on a timer/float deal where it will pump from the well only when the Cistern tanks call for it. (kinda like a toilet tank). My question is can I get away with a 1/3 hp pump to pump the water from the Cistern to the other Pressure tank and then throughout the house. 3pc bathroom on the 2nd floor.. I have a real good deal on an almost new 1/3 hp Myers pump if I could do it. Help please and Thanks in advance. mainstation.